/*******************************************************************************
 * Copyright (c) 2003, Loya Liu
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   - Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *   - Neither the name of the MAZE.ORG nor the names of its contributors
 *     may be used to endorse or promote products derived from this software
 *     without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *******************************************************************************/
package org.maze.eimp.app;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.maze.eimp.im.Buddy;
import org.maze.eimp.im.UserStatus;
/**
 * @author Vilmar
 * 
 * implements a procedure to filter offline buddies
 *  
 */
public class BuddyFilter extends ViewerFilter {
	private boolean ignoreOfflineBuddies;
	/**
	 * @param ignoreOfflineBuddies
	 */
	public BuddyFilter(boolean ignoreOfflineBuddies) {
		 setIgnoreOfflineBuddies(ignoreOfflineBuddies);
	}
	public void setIgnoreOfflineBuddies(boolean ignoreOfflineBuddies) {
		this.ignoreOfflineBuddies = ignoreOfflineBuddies;
	}
	public boolean isIgnoreOfflineBuddies() {
		return ignoreOfflineBuddies;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer,
	 *           java.lang.Object, java.lang.Object)
	 */
	public boolean select(Viewer viewer, Object parentElement, Object element) {
		if (ignoreOfflineBuddies) {
			if (element instanceof Buddy) {
				Buddy b = (Buddy) element;
				return (!b.getStatus().equals(UserStatus.OFFLINE));
			}
		}
		return true;
	}
}